Shell small, solid, white, with a minute brown reticulate nucleus of two and a half whorls and about six subsequent well-rounded whorls; suture distinct; axial sculpture of (on the last whorl about 16) strong squarish ribs with equal or narrower interspaces and more or less obvious incremental lines; spiral sculpture of (on the early whorls 2, later 3, and on the last whorl 4) strong cords, which make with the ribs deep reticulations but are not nodulous at the intersections with the ribs; the anterior cord is within the rounded margin of the base, and between it and the axis the surface is nearly smooth and slightly concave; aperture rounded, the outer lip crenulate by the sculpture; the axis is impervious. Length of shell, 4; of aperture, 0.75; diameter, 1.7 mm. U. S. Nat. Mus. Cat, No. 108370.
Off Georgia, one specimen.
This is a very characteristic form, having somewhat the aspect of a Mathilda. I have found nothing figured which approaches it.

N. azelotes was described based on a single specimen found off Femandina, Florida, at a depth of 440m. It reaches a maximum size of at least 4.1mm. The shell is flat white in color, with 7 teleoconch and at least 2 protoconch whorls. The protoconch whorls are brown, with axial ribs. The reticulate sculpture consists of 17 costae and 3 or 4 strong spiral cords per whorl. The shell is beaded where the spiral and axial sculpture cross. A strong basal disk is present. The aperture is almost round.
This species is rather similar to N. concinna from the eastern Atlantic. While there are differences, it is not clear whether there are two species or a single variable one.